Evaluate Reverse Polish Notation LeetCode solution in Java

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class Solution {
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  public int evalRPN(String[] tokens) {
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    Stack<Integer> stack = new Stack();
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    for (String i : tokens) {
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      if (i.equals("+") || i.equals("-") || i.equals("*") || i.equals("/")) {
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        int a = stack.pop();
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        int b = stack.pop();
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        int temp = 0;
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        if (i.equals("+")) temp = a + b;
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        else if (i.equals("-")) temp = b - a;
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        else if (i.equals("*")) temp = a * b;
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        else if (i.equals("/")) temp = b / a;
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        stack.push(temp);
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      } else stack.push(Integer.parseInt(i));
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    }
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    return stack.pop();
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  }
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}